Brittany Kaiser as reported by Jake Kanter:

“I believe it is almost certain that the number of Facebook users whose data was compromised through routes similar to that used by Kogan is much greater than 87 million; and that both Cambridge Analytica and other unconnected companies and campaigns were involved in these activities.”

I think it’s very safe to assume that if you have a Facebook account, or had one at any point between 2014 and now, that your personal data was compromised and remains “out there”. If that’s not enough to get you to leave, then I don’t know that you fully understand how dangerous that data can be and is.